We talked a looong time ago and even exchanged e-mails, but there was a lot going on my end, and I've lost contact. You were sending me some awesome old rock music. It was nice talking to you. Are you still there?

I'll go with the most random thing possible, lol. 'Cause why not...
What's your favourite pizza? ...and can you make it at home? lol.

True, that doesn't sound like a healthy relationship. ...but wtf, you do see all red flags clear as a day. I'm on the team "dump his ass" 'cause people like that don't change. Please, make yourself a priority for now.
Be ready for a heated argument instead of a breakup, unless you literally ditch him by a text or something. However bad it may look, make your safety and psychological comfort a priority - especially, when he's verbally abusive to you.
With the door slamming - I'd be scared that things could even result into physical violence, so please do NOT waste your precious time and mental health and dump his ass.
Best of luck!

We talked a looong time ago and even exchanged e-mails, but there was a lot going on my end, and I've lost contact. You were sending me some awesome old rock music. It was nice talking to you. Are you still there?